Passing ArrayCollection from Flex to CFCs

I currently have a flex app setup using WebServices to communicate between the app and my CFCs.  Everything works well until I attempt to pass across my dataGrid information which are setup as ArrayCollections.  I have searched and searched and every example and/or response I've found results in more errors.  I've attempted passing the arrayCollection.source attribute into an array argument which gives me an error.  The only thing I found to not throw an error is passing the arrayCollection into a CFC struct.  This only provides me with a struct of objects and no data.  Any ideas on things I am missing?  I can post code if need be, however, I was hoping it was just an easy fix due to something simple I'm forgetting. 

Thanks!